Great article! My homeschooled 6th grader is studying about rocks right now and we had fun with this article. He also loves popcorn and loved the connection (and neither of us knew about the water droplet in the popcorn...). Thanks for posting!
My post #7 has a photo of actual popcorn rock. For some reason Science Daily posted a picture of actual popcorn. My bad. I looked at it more closely and thought “That picture is close but not right”. The real stuff is a lot prettier and more interesting. Post seven is the real stuff.